Viable Alternatives to Current Methods by Promoting the Secondary Spectrum Market

The Wireless Internet Service Providers Association (WISPA) recently issued a letter strongly opposing aspects of a draft bill entitled “Spectrum Innovation Act of 2011.” The open letter to the government cites that “aspects of the draft would threaten the continued development of affordable fixed broadband services to Americans living in rural, unserved and underserved areas of the country.” The WISPA organization has a point and raises some very significant issues, but we should not ignore the spectrum policy and innovations that the industry has been building upon over the past decade, specifically the secondary spectrum market.

Spectrum Bridge firmly believes that there are viable alternatives to current spectrum allocation methods if industry continues to promote secondary markets. In an earlier blog post, Spectrum Bridge mentioned that the secondary spectrum market was created by the FCC to enable “spectrum to flow more freely among users and uses in response to economic demand.” The demand for spectrum continues to increase on a daily basis, but there are alternatives to utilizing unused bandwidth in the U.S. as opposed to drafting and passing bills dedicated to current Spectrum Auction processes. The auction process is, realistically, only available to a small subset of spectrum users and only executed by the FCC when large swathes of spectrum are available. So in addition to limiting bidders much spectrum sits in inventory in the hope that there will eventually be enough to justify an auction. Secondary markets are the only option for many spectrum users and they can also be an outlet for the FCC to permit use of spectrum sitting idle in inventory.

Thanks to the FCC efforts and continued innovation in technology, industry is now able to stand on its own to help allocate unused frequencies on an as needed basis. Major industry players are beginning to take a larger role in how spectrum is allocated and managed. For example, Qualcomm and Nokia have recently proposed the concept of Authorized Shared Access which allows spectrum sharing via cognitive network technologies which are aimed at benefiting consumers and helping to sustain economic growth.

With the whole notion of viable alternatives to current methods, the government will not necessarily need to be in the involved, industry is more than capable of managing spectrum and allocating it to meet demand. Spectrum management solutions and secondary markets will see an increase in value over time as the ever increasing spectrum scarcity continues to burden policy makers in the near term. The increasing role of industry giants only emphasizes the desire for alternatives to current methods such as shared access and secondary markets.

- Peter Stanforth, CTO

Spectrum Sharing Through Databases

A recent paper written by a group of Stanford engineers explores the idea of "stitching together" all available wireless networks, allowing users to move freely between spectrum and networks owned by different cellular and WiFi providers, helping to improve the efficiency of unused spectrum. This approach would enable companies to "share" spectrum from other providers and reroute their traffic load during peak hours, making their network more efficient.

Many of the concepts are closer to reality than the paper suggests. In fact, Spectrum Bridge has developed multiple spectrum sharing technologies and solutions based on existing and upcoming FCC regulations. Our creation of a proprietary TV White Spaces Database, allowing anyone to locate available White Spaces, demonstrates the concept of spectrum sharing through the use of a database. We expect the FCC to complete the rule making on White Spaces this year, and products and services based on this concept will quickly enter the marketplace.

In partnership with WISPA, and the wireless industry, we developed the UDIA database, another example of spectrum sharing. This solution identifies potential device interference with Terminal Doppler Weather Radars (TDWRs) in the 5 GHz band. By providing a way for network operators to "share the air", we have opened up the market for certified equipment use in the shared TDWR and UNII frequencies.

Universal Spectrum Access allows us to leverage the secondary market for spectrum and utilize dynamic spectrum databases to make bandwidth more widely available. By allowing multiple devices to operate in the same band, Spectrum Bridge is able to provide a more efficient spectrum sharing environment. For example, this database could allow two entities to share spectrum in a deterministic way - the first entity, a school could use the available spectrum for distance learning from 8 am to 4 pm on school days. The second entity, a utility company, could then utilize the same spectrum from 12 am to 2 am for remote meter readings, creating a more efficient utilization of spectrum.

Our solutions support many of the National Broadband Plan goals outlined by the FCC, and specifically address the Presidential Memorandum, "Unleashing the Wireless Broadband Revolution", in which President Obama spoke to the need for the more efficient use of existing spectrum and advanced spectrum sharing technologies in order to expand wireless broadband access. As we continue to demonstrate the capabilities of our spectrum sharing technologies, we look forward to updating you on our findings. (To learn more about spectrum sharing, click here)

- Peter Stanforth, CTO

Spectrum Bridge Database Solution facilitates Spectrum sharing in 5GHz Band

Spectrum Bridge has partnered with the Wireless Internet Service Providers Association (WISPA) creating the UNII Device Interference Advisor (UDIA). The UDIA is a spectrum database solution that provides network operators in the Unlicensed National Information Infrastructure (UNII) frequencies (5.47-5.725 GHz) an easy way to search and find whether their towers potentially interfere with Terminal Doppler Weather Radar (TDWR) systems.

There are currently 47 TDWR systems located nationwide; operators and installers are being encouraged to voluntarily register and manage their device information in the online database. UDIA was developed to promote cooperation between the federal agencies including the National Telecommunications and Information Association (NTIA), the Federal Communications Commission (FCC), the Federal Aviation Administration (FAA), and the wireless industry and to ensure the safe and interference free operation of the FAA’s TDWR network.

Mitigating interference issues between unlicensed wireless devices operating in a frequency band shared with TDWRs makes available approximately 300 MHz of previously unusable spectrum. Efficiently sharing this spectrum not only helps meet the demands outlined in the FCC National Broadband Plan, it also supports Spectrum Bridge’s Universal Spectrum Access vision. Additionally, equipment manufacturers and the wireless industry may also look ahead to the certification of new U-NII equipment. For more information on the release of the database powered by Spectrum Bridge, click here.

- Peter Stanforth, CTO